Slicing machine



May 21, 1929.

J. C. VAN BERKEL SLICING MACHINE Filed NOV. 22, 1926 Patented May 21, 1929.

*UNITED STATES.

1,713,936 PATENT OFFICE.

J'OBANNES CORNELIS VAN BERKEL, OF CO PENHAGEN, DENMARK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO NAAMLOOZE VENNOOTSQHAP' MAATSCHAPPIJ TOT VERAARDIG- ING VAN SNIJMACHINES VOLGENS VAN BERKELS PATENT EN VAN ANDERE WERKTUIGEN, OF ROTTERDAM, NETHERLANDS, A LIMITED-LIABILITY COMPANY.

SLICING MACHINE.

Application filed November 22, 1926, Serial No. 149,804, and in Great Britain April 24, 19 26.

This invention relates to slicing machines, of the type characterized by a swinging arm adapted to carry the rotary knife and to move the latter transversely to the substance carrying table.

Hitherto, in slicing machines of the above type, the shaft of the driving sprocket for a chain which operatively connects said sprocket to a sprocket secured to the knife shaft, is provided with a pinion adapted, in the movement of the swinging arm, to roll along a fixed toothed segment and, in one direction of movement of said arm, to rotate the knife shaft.

A disadvantage of this arrangement is that said pinion works as a free-wheel in the other direction of movement of the swinging-arm, thus causing the machine to be very noisy in operation.

The object of the present invention is to overcome this disadvantage and to this end, according to the invention, I provide a slicing machine, of the type referred to, in which the rotary knife is operated independently of the movement of the swinging-arm.

Preferably, the rotary knife is operated by power means; such, for example, as an electric motor; and the swinging arm is operated by independent power means or by. hand.

Means may also be provided whereby the power means operating the rotary knife is automatically zrendered inoperative each time the swingingarm is returned to its original starting position. Said means may ,consist of a movable switch-arm in the electrical circuit to the electric motor and a cam on the swinging-arm adapted to co-operate with the switch-arm.

A constructional form of the present invention, applied to a slicing machine having a hand-operated swinging-arm, is shown on the annexed sheet of drawings, whereon Fig. 1 is a side elevation of the machine;

Fig. 2 is 'a I iew of the rear end of the mamachine; an

Fig. 3 is a fragmentary view of a device whereby the current to the electric motor is automatically out off each time the swingingarm is returned to its original starting position.

, Referring to the drawing The machine comprises a frame 1 whereon is slidably guided a substance-carrying table 2, having the usual uprights 2 and a meat clamp 2 thereon, said frame being formed with an upstanding bracket 3, which is formed, at one side, with projecting edge, or wall, 4. The table 2 is advanced toward the knife by suitable mechanism (not shown).

A shaft 5 is journalled in a bearing provided at the upper part of the bracket 3, an annular wheel 6, having internal teeth 7, being secured to the shaft at the rear of said bracket. An electric motor 8 is mounted on a bracket 9 secured to the bracket 3 below the internally toothed wheel 6, a pinion 10 being secured to the shaft 11 of the motor and arranged to engage the teeth 7 of the wheel 6 and to drive the latter. The pinion l0 and the wheel 6 are both made of pockwood, or similar material, in order to provide a noiseless drive. A chain sprocket 12 is secured to the shaft 5 'on the other side of the bracket 3, and a downwardly depending arm 13 is pivotally mounted on said shaft between the boss 14 of said sprocket and the adjacent face of the bracket 3.

A knife shaft 15 is journalled in the.

forked end of the arm 13, a rotary knife 16 being secured to said shaft and protected by a guard 17 secured to the arm 13. In order to rotate the knife shaft, a chain sprocket 18 is secured thereon and is operatively connected to the driving sprocket 12 by means of an endless chain 19. A handle 20 fixed to the arm 13 allows the latter to be hand-operated, a stop-pin 21 limiting the swinging movement of the arm.

A negative lead 22 is connected to the elec tric motor and the current supply to the latter is adapted to be interrupted by means of a switch inserted inthe positive lead 23 and comprising a pivoted switch-arm 24 and a spring 25, which normally holds the switch 0 ose r A laterally projecting cam 26 is provided on the swinging-arm 13 andis arranged in such a manner with respect to the switch-arm 24 that, whenthe swinging-arm is at the starting point of its outward swing, i. e. with its axis vertical, as shown in Fig. 3, said cam bears against the switch-arm and resses it outward against the inward p111 of the spring 25, thus breaking the current. When, however, the swinging-arm is moved outward, the spring returns the switch-arm to its original position, so that the current once ment referred to. Moreover, the provision of a co d crating cam 26 and switch-arm 24, ensures that the electric current to the motor will be cut off immediately the operation of the machine is discontinued.

- I claim 1. A slicing machine comprising a support,

for material to be sliced, an arm pivoted to oscillate past the material on said support, a knife j ournalled on said arm, a shaft co-axial with the pivotal support for said arm, driving connection between -said shaft and knife manual means foreoscillating said arm, an

means for rotatin said shaft to drive said knife independently of the movement of said 2 arm upon its pivotal support.

2. A slicing machine comprising a support for material to be sliced, an arm pivoted on said support to oscillate past the material on said su port, a knife journalled on said arm,

'30 means or swingingsaid arm upon its pivotal support tocause sa1d knife to sever slices from the material on said material support, a shaft co-axial with the pivotal support for said arm, a driving connection between said shaft and said knife for rotating 'saidknife, and a' motor for rotating said shaft.

-3. A slicing machine comprising a support for material to be sliced, an armpivotally 'mounted on said support, a shaft journalled 40 on said arm and'movable past the-material on said support when said arm is oscillated upon its pivot, a shaft co-axial with the pivotal support for said arm, a driving connection betweensaid shaft and said knife, an electric motor mounted on" said support for driv ing said shaft, and means for de-energizing said motor when said arm is in one position. I 4. A slicing machine comprising a support for material to be sliced, an arm' pivotally mounted on said support, a knife journaled on said arm and movable past the material on said support to sever slices therefrom when said arm is oscillated upon its pivot, ashaft co-axial with the pivotal support of said arm,

driving connection between said shaft and said knife, an electric motor for rotating said shaft, a circuit for supplying current to sa1d motor, a switch 1n sa1d c1rcu1t,and means g controlled by said arm for opening said switch when said arm assumes its normal position of rest.

5. A slicing machine comprising a support for material to ice sliced, a shaft journalled in said sup ort, an arm pivotally mounted on said sha t and hanging downwardly there from, a' knife journalled on said arm inpo sition to sever shoes from material on sa1d support when said arm,1s oscillated on its pivot, a motor for rotating said shaft, a driv ing connection between. said shaft and said knife, a switch for controlling said motor, and means for automatically openin said switch when said arm is permitted to swing by gravity to its normal inactive position.

6. A slicing machine comprising a support having a horizontally movable feed table thereon, and a bracket extending upwardly above said feed table, a shaft journalled on said bracket, a motor mounted on said bracket for rotating said shaft, an arm pivoted on said shaft and hanging downwardlytherefrom, a knifejdurnaled on said arm ,in position to sever slices from material on saidfeed table when said arm is oscillated, driving mechanism arranged to oscillate with said arm and connecting said knife with said shaft to drive said knife, a motor for rotating said shaft, a switch for controlling saidmotor, a

spring for holding said switch in closed posi-' 'tion, and means connected with said arm for opening'said switch when said arm ismoved to its normal inoperative position. 7 'A slicing machine comprising a table for suppprting material to be sliced, an up.- right support extending "above said table, an arm pivotally mounted on said upright support, a rotary knife carried by said arm, means for manually oscillating said arm, and a motor having a drivin connection with said knife independent of tie movement of said arm.

In testimony whereof I have signed my name to this specification on this 16th .day of October A. D. 1926.

JOHANNES CORNl-ELIS van BERKl-ZL. I 

